The purpose of this paper is to identify the specifications of volcanic tuff (scoria) widespread in the south of Syria, many laboratory tests have been done for determining the basic physical properties of scoria the addition of compaction, shear res
istance, particle size distribution, and California bearing ratio. Also, an analytic study has been done to state the possibility of using scoria in filling by itself or after being mixed with clay (forming the greatest part of soils in south Syria), examining the change occurring in clay. So we have determined clay specifications, adding scoria to clay using different percentages:
(5% - 10% - 15% - 20% - 25% -30%)
Then we study the specifications of each mixture, such as compaction properties, shear resistance, particle-size distribution, and California bearing ratio.
This research deals with producing structural lightweight aggregates concrete (the
density is less than 1920kg/m3 and compressive strength is more than 17.2Mpa according
to ACI 213R-03) by using scoria aggregates. Several concrete mixes have been d
esigned
with different proportions of scoria aggregates. The cement content (c=450 kg/m3), the
ratio (w/c = 0.36) were kept constant in all the mixes.
Different tests were performed to determine some properties of product concrete
such as density, compressive strength and splitting tensile strength. The density of product
concrete was in the range of (1752-1917 kg/m3), compressive strength was in the range of
(22.2-32.8Mpa), and the splitting strength was in the range of (2.3-3.2Mpa). The study
demonstrated the possibility of production concrete achieved the Requirements of the
American code ACI 213R-03 for structural lightweight concrete.
This study presents definition of the types of lightweight concrete and
some studies, which use the volcanic scoria aggregates to produce
structural lightweight concrete.
Several concrete mixes were designed, and different tests were
performed to
determine its properties.
